Environmental Engineering Reference
In-Depth Information
FIgure 25.1
Example.of.a.very.unsafe.abrasive.wheel.
.
2.. Where. the. nature. of. the. work. is. such. as. to. entirely. cover. the. side. of. the.
wheel,.the.side.covers.of.the.guard.may.be.omitted.
.
3.. The.spindle.end,.nut,.and.outer.lange.may.be.exposed.on.machines.designed.
as.portable.saws.
Work. rests. are. to. be. adjusted. so. that. they. are. no. more. than.
1
/
8
. inch. from. the.
.abrasive. wheel.. Abrasive. wheel. safety. guards. for. bench. and. loor. stands. and. for.
cylindrical. grinders. should. not. expose. the. grinding. wheel. periphery. more. than.
65 degrees.above.the.horizontal.plane.of.the.wheel.spindle..The.protecting.member.
must.be.adjustable.for.variations.in.wheel.size.so.that.the.distance.between.the.wheel.
periphery.and.the.adjustable.tongue.(tongue.guard).or.end.of.the.peripheral.member.
at.the.top.shall.never.exceed.
1
/
4
.inch..Machines.designed.for.a.ixed.location.must.be.
securely.anchored.to.prevent.movement,.or.designed.in.such.a.manner.that.in.normal.
operation.they.will.not.move.(see.Figure 25.1).
Other.precautions.include.the.wearing.of.goggles.or.face.shields.when.grinding..
Each. grinder. must. have. an. individual. on. and. off. control. switch. and. be. effec-
tively.grounded..Before.new.abrasive.wheels.are.mounted,.they.should.be.visually.
inspected.and.ring.tested..Dust.collectors.and.powered.exhausts.must.be.provided.
on.grinders.used.in.operations.that.produce.large.amounts.of.dust,.and.splashguards.
must.be.mounted.on.grinders.that.use.coolant.in.order.to.prevent.the.coolant.from.
reaching.employees.
AIr receIvers (29 cFr 1910.169)
Air. receivers. have. safety. requirements. similar. to. compressors. and. must. be. oper-
ated.and.lubricated.in.accordance.with.the.manufacturer's.recommendations..Every.
receiver.must.be.equipped.with.a.pressure.gauge.and.with.one.or.more.automatic,.
